EP 1714170 B1 20111130 - METHOD OF ELIMINATING CONDUCTIVE DRILL PARASITIC INFLUENCE ON THE MEASUREMENTS OF TRANSIENT ELECTROMAGNETIC COMPONENTS IN MWD TOOLS
Title (en)
METHOD OF ELIMINATING CONDUCTIVE DRILL PARASITIC INFLUENCE ON THE MEASUREMENTS OF TRANSIENT ELECTROMAGNETIC COMPONENTS IN MWD TOOLS
Title (de)
VERFAHREN ZUM BESEITIGEN VON PARASITÄREN EINFLÜSSEN EINES LEITFÄHIGEN BOHRERS AUF DIE MESSUNGEN VON TRANSIENTEN ELEKTROMAGNETISCHEN KOMPONENTEN IN MWD-WERKZEUGEN
Title (fr)
PROCEDE D'ELIMINATION D'INFLUENCE CONDUCTRICE PARASITE DE FORAGE SUR LES MESURES DE COMPOSANTES ELECTROMAGNETIQUES TRANSITOIRES DANS LES INSTRUMENTS DE MESURE EN COURS DE FORAGE
Publication
Application
Priority
- US 2005003799 W 20050204
- US 77186804 A 20040204
Abstract (en)
[origin: US2005167100A1] A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A receiver on the BHA receives signals that are indicative of formation resistivity and distances to bed boundaries. The transmitter and receiver may have axes that are parallel to or inclined to the axis of the BHA. The transmitter and the receiver are on a tubular on a damping portion of the BHA that includes cuts for attenuating eddy currents. The damping portion may include non conducting material such as a ferrite on the outer surface.
IPC 8 full level
G01V 3/28 (2006.01); A23B 4/03 (2006.01); A23C 15/04 (2006.01)
CPC (source: EP GB US)
A23B 4/031 (2013.01 - EP US); G01V 3/28 (2013.01 - EP GB US)
Designated contracting state (EPC)
FR
DOCDB simple family (publication)
US 2005167100 A1 20050804; US 7150316 B2 20061219; CA 2554577 A1 20050825; CA 2554577 C 20110426; DE 112005000285 T5 20061214; EP 1714170 A1 20061025; EP 1714170 B1 20111130; GB 0614859 D0 20060906; GB 2425609 A 20061101; GB 2425609 B 20080723; NO 20063904 L 20060929; NO 336659 B1 20151012; RU 2006131555 A 20080310; RU 2377607 C2 20091227; WO 2005078481 A1 20050825
DOCDB simple family (application)
US 77186804 A 20040204; CA 2554577 A 20050204; DE 112005000285 T 20050204; EP 05722793 A 20050204; GB 0614859 A 20050204; NO 20063904 A 20060901; RU 2006131555 A 20050204; US 2005003799 W 20050204